Plugin works but it is not compatible with WPML so everything but default language will throw 404 error.
It is possible to fix it with a very simple solution (which for some reason wasn't implemented and support question was closed) https://wordpress.org/support/topic/wpml-compatibility-131/

I am using this with Easy Digital Downloads. Wanted to add category to the slug.
To anyone who wants to add category slug in Easy Digital Download. Add this in the options /%download_category%/%postname%/